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MASON HIEU PHAN
NPI 1639757032
Radiology - Diagnostic Radiology in Loma Linda, CA

Active since March 29, 2021PECOS EnrolledAccepts Medicare Assignment
11234 ANDERSON STREET, WESTERLY C, LOMA LINDA, CA 92354(909) 558-4000 Get Directions Write a Review

NPPES record last updated: February 11, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 30, 2022, Mar 29, 2021 (2 updates tracked since 2021).

About Mason Hieu Phan NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MASON HIEU PHAN (NPI 1639757032) is an individual diagnostic radiology provider in Loma Linda, California, licensed in California (A182123) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Georgetown University School Of Medicine (2021).

NPPES Registry Identity

NPI1639757032
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameMASON HIEU PHAN
Location Address11234 ANDERSON STREET, WESTERLY CLoma Linda, CA 92354
Mailing Address11234 Anderson Street, Gme Office Westerly Suite CLoma Linda, CA 92354-2804 · (909) 558-7814
Phone(909) 558-4000
Sole ProprietorNo
Medical School CMSGeorgetown University School Of MedicineGraduated 2021
Enumeration DateMarch 29, 2021
Last NPPES UpdateFebruary 11, 20262 updates tracked since enumeration
NPPES CertifiedFebruary 11, 2026
✔ NPI 1639757032 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in CA · A182123
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
11234 ANDERSON STREET, Loma Linda, CA 92354
Open in Google Maps ↗

Secondary Practice Locations 2

Location 14445 Magnolia AveRiverside, CA 92501-4135 · Phone (951) 788-3274
Location 2101 The City Dr SOrange, CA 92868-3201 · Phone (714) 456-8888

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mason Hieu Phan is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7618447632
PECOS Enrollment IDI20260529004059
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Mason Phan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Faculty Physicians And Surgeons Of Llusm
Same address
Pediatrics
11234 ANDERSON ST
Loma Linda, CA 92350
  • Reassigned Medicare billing, California enrollment
  • 2,584 clinicians in this Medicare group
NPI 1477503407 (909) 558-4000
Uc Regents
40 mi
Diagnostic Radiology
101 THE CITY DR S
Orange, CA 92868
  • Reassigned Medicare billing, California enrollment
  • 202 clinicians in this Medicare group
NPI 1346298528 (714) 456-8068

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92354 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$91.88 typical visit price
range $59.60 – $179.42
Typical copayment $22.97 (range $14.90 – $44.85)
Most-billed visit code 99203
Established Patient
$74.08 typical visit price
range $19.37 – $146.42
Typical copayment $18.52 (range $4.84 – $36.60)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ABHISHEK JAY DHARAN MD
Student in an Organized Health Care Education/Training Program
11234 ANDERSON STREET, GME OFFICE WESTERLY SUITE C
LOMA LINDA, CA 92354
San Bernardino County (909) 558-6491
RACHEL ELIZABETH GELFOND DAVIDGE D.O.
Pediatrics
11234 ANDERSON STREET, LOMA LINDA UNIVERSITY HEALTH, GENERAL PEDIATRICS
LOMA LINDA, CA 92354
San Bernardino County (909) 558-4174
DR. KRISTINA KYLE M.D.
Emergency Medicine
11234 ANDERSON STREET, LOMA LINDA UNIVERSITY HEALTH - EMERGENCY MEDICINE
LOMA LINDA, CA 92354
San Bernardino County (909) 558-4085
DOUGLAS WANG
Internal Medicine
11234 ANDERSON STREET, GME OFFICE WESTERLY SUITE C
LOMA LINDA, CA 92354
San Bernardino County (909) 558-4174
FARAH SHAKER ABED ABUAZZAM
Student in an Organized Health Care Education/Training Program
11234 ANDERSON STREET
LOMA LINDA, CA 92354
San Bernardino County (909) 558-4911
DR. JOSHUA STUART MACLAUGHLAN MD
Radiology (Diagnostic Radiology)
11234 ANDERSON STREET
LOMA LINDA, CA 92354
San Bernardino County (909) 558-7814
YURI JIN
Emergency Medicine
11234 ANDERSON STREET, EMERGENCY MEDICINE
LOMA LINDA, CA 92354
San Bernardino County (909) 558-4085
SHELDON VOGT
Student in an Organized Health Care Education/Training Program
11234 ANDERSON STREET, LOMA LINDA UNIVERSITY HEALTH-SURGERY
LOMA LINDA, CA 92354
San Bernardino County (909) 558-2822

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mason Phan's NPI number?

The NPI number for Mason Phan is 1639757032. It was assigned to this individual provider in the NPPES registry on March 29, 2021.

Where is Mason Phan located?

Mason Phan practices at 11234 Anderson Street Westerly C, Loma Linda, CA 92354. The listed phone number is (909) 558-4000.

What is Mason Phan's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Mason Phan enrolled in Medicare?

Yes. Mason Phan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Mason Phan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mason Phan reassigns Medicare benefits to 2 organizations: Faculty Physicians And Surgeons Of Llusm (Loma Linda, CA) and Uc Regents (Orange, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mason Phan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mason Phan was last updated on February 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.